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CSS移动万物

CSS动画是一种在网页中展示动态和交互性的方式。在移动端,越来越多的应用需要CSS动画来提高用户体验,例如按钮动效、页面切换效果等。CSS移动动画可以让万物动起来,大大提高用户体验。

一、移动易联万物

移动易联是一个物联网平台,提供传感器、智能硬件等产品以及云端的物联网解决方案。在移动端,展示传感器数据和控制智能设备需要使用CSS动画来提高用户交互体验。

CSS动画可以给用户提供明显的反馈,例如按下按钮后,按钮会有一个动画弹起的效果。通过CSS动画还可以制作各种智能设备的控制效果,例如智能灯泡的亮度渐变效果,智能插座的开关动效等。

下面是一个使用CSS动画实现的智能插座开关动效示例:

.btn {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
  border-radius: 15px;
  background: #ccc;
  cursor: pointer;
}

.btn::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 2px;
  width: 26px;
  height: 26px;
  border-radius: 13px;
  background: #fff;
  transition: all .2s ease-in-out;
}

.btn.active::after {
  left: 32px;
  background: #00ff00;
}

二、万物五官怎么移动

移动万物不仅仅是移动整个元素,还可以移动元素的某个特定部分。CSS提供了多种方式来移动万物五官,例如CSS3中的transform属性和transition属性。

下面是使用CSS3 transform属性实现移动万物五官的示例:

.box {
  position: relative;
  width: 200px;
  height: 200px;
  border: 1px solid #ccc;
}

.box .eye {
  position: absolute;
  width: 20px;
  height: 20px;
  background: #000;
  border-radius: 50%;
}

.box .left-eye {
  left: 40%;
  top: 30%;
  transform: translateX(-20px);
}

.box .right-eye {
  left: 60%;
  top: 30%;
  transform: translateX(20px);
}

@media screen and (max-width: 768px) {
  .box .left-eye {
    left: 30%;
    top: 30%;
    transform: translateY(-20px);
  }
  
  .box .right-eye {
    left: 50%;
    top: 30%;
    transform: translateY(20px);
  }
}

上面的示例中使用transform: translateX(-20px)和transform: translateY(-20px)来移动万物五官,当屏幕宽度小于768px时,使用transform: translateY(-20px)和transform: translateY(20px)来移动。

三、选取优化CSS动画的技巧

在使用CSS动画时,需要注意以下几个方面来优化动画效果和性能:

1、使用transform属性而不是left、top属性来移动元素。

2、使用will-change属性来提前告诉浏览器元素将要发生改变。这样浏览器可以提前优化元素的渲染,提高动画性能。

3、尽量避免使用高消耗的CSS滤镜效果和box-shadow效果,以免影响动画性能。

4、使用requestAnimationFrame方法来代替setTimeout方法来实现动画。

下面是一个实现优化CSS动画的示例:

.box {
  position: absolute;
  top: 50%;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: #000;
  transform: translateY(-50%);
  will-change: transform;
}

.box:hover {
  transform: translateY(-50%) scale(1.2);
  transition: transform .3s ease-in-out;
}

上面的示例中使用transform: translateY(-50%) scale(1.2)来实现元素的移动和缩放。通过使用will-change属性,浏览器可以提前优化元素的渲染,提高动画性能。使用transition属性来实现CSS动画,同时使用鼠标悬停来触发。

通过这些优化技巧,可以让CSS动画在移动端展现更好的性能和用户体验。

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when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.id} [in template "article/detail/index.ftl" at line 48, column 106] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244) at freemarker.core.Environment.visitIteratorBlock(Environment.java:645) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:335) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.process(Environment.java:314) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:332) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:266) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:220) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1431) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1167) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at com.software.filter.HttpSpiderIdentifyFilter.doFilter(HttpSpiderIdentifyFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)